FT-Raman spectra of o-, m-, and p-Nitrophenol included in cyclodextrins

FT-Raman spectra of o-, m-, and p-nitrophenol included in α-cyclodextrin (CD), β-CD, hydroxypropyl (HP) β-CD, and sulfated β-CD were recorded. The phenyl v(C=C) band of o- and p-nitrophenol in the CD inclusion complexes was shifted to higher wavenumber than that of pure o- and p-nitrophenol, whereas the phenyl v(C=C) band of m-nitrophenol in the CD inclusion complexes was shifted to lower wavenumber than that of pure m-nitrophenol. The ring vCH peak of o-nitrophenol in the CD complexes was shifted to higher wavenumber than that of pure o-nitrophenol, whereas the ring vCH peak of m-and p-nitrophenol in the CD complexes was shifted to lower wavenumber than that of pure m- and p-nitrophenol.